mirror of
https://github.com/postgres/postgres.git
synced 2025-05-29 16:21:20 +03:00
d8e34fa7a1
Two callers of generate_useful_gather_paths were testing the wrong thing when deciding whether to call that function: they checked for being at the top of the current join subproblem, rather than being at the actual top join. This'd result in failing to construct parallel paths for a sub-join for which they might be useful. While set_rel_pathlist() isn't actively broken, it seems best to make its identical-in-intention test for this be like the other two. This has been wrong all along, but given the lack of field complaints I'm hesitant to back-patch into stable branches; we usually prefer to avoid non-bug-fix changes in plan choices in minor releases. It seems not too late for v15 though. Richard Guo, reviewed by Antonin Houska and Tom Lane Discussion: https://postgr.es/m/CAMbWs4-mH8Zf87-w+3P2J=nJB+5OyicO28ia9q_9o=Lamf_VHg@mail.gmail.com
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.